We upgraded our exchange environment to 2010 from 2003 a few months ago. We have had the old 2003 servers shutdown for a few weeks. We are now trying to uninstall 2003 from them. We got the front end done with no problems but we are having an issue with the backend. When I go to remove I get an error that there are still mailboxes on it and they need to be moved or deleted. There are some that I can delete but there are other Distribution groups that I need to move. I have figured out how to do a search in AD users & Computers so I can see only what is on the old server but I can't find anywhere to move them to the new server. It is not like moving a user mailbox with a local move request.
Thanks in advance.